| Quick Specs: Honda CRF 250 X (2004-2017) | |
|---|---|
| Engine Oil | SAE 10W-30/10W-40 (JASO MA) – 0.69L (w/ filter) |
| Transmission Oil | SAE 10W-30/10W-40 (JASO MA) – 0.67L |
| Front Tire | 80/100-21 51M (1.0 bar / 15 psi) |
| Rear Tire | 100/100-18 59M (1.0 bar / 15 psi) |
| Battery | YTZ7S (12V Sealed Lead Acid) |
| Spark Plug | NGK IMR8C-9H |
The Honda CRF 250 X holds a significant place in off-road history as the first dedicated enduro machine to successfully implement Honda’s proprietary Unicam® valve train. By utilizing a single overhead cam to actuate the intake valves directly and the exhaust valves via a forked roller rocker arm, Honda achieved a weight reduction of approximately 15% compared to traditional DOHC designs, significantly lowering the bike’s center of gravity and enhancing its legendary flickability in tight technical woods.
Engineering & Performance
Produced between 2004 and 2017 under the internal designations ME11A, ME11D, and ME114, the CRF 250 X was designed to provide a more accessible, trail-friendly alternative to the aggressive CRF 250 R. Unlike its motocross sibling, the X-model features a wide-ratio five-speed transmission, an electric starter, and a 18-inch rear wheel for better traction and puncture resistance in rocky terrain.
Maintenance Protocol: The Dual-Sump System
One of the most critical technical aspects of the ME11 series is the split-sump lubrication system. Honda isolated the engine oil from the transmission oil to prevent clutch debris from contaminating the high-precision valve train and crankshaft bearings.
- Engine Side: Requires 0.69 Liters (with filter change). Use JASO MA certified oil to ensure compatibility with high-RPM operation.
- Transmission Side: Requires 0.67 Liters. Avoid oils with friction modifiers (molybdenum) as they will cause clutch slippage.
Chassis and Handling
The aluminum twin-spar frame was specifically tuned for enduro flexibility, offering more vertical compliance than the R-model to reduce rider fatigue. The suspension, featuring Showa 47mm inverted forks and a Pro-Link rear shock, is valved softer for technical obstacles. To maintain optimal handling, tire pressures should be strictly monitored at 1.0 bar (15 psi) for standard trail conditions, though riders may drop to 12 psi for extreme mud or sand.
Electrical and Ignition
The CRF 250 X utilizes a specialized NGK IMR8C-9H iridium spark plug. The fine-wire iridium tip provides a more concentrated spark, which is vital for the bike’s quick-start capabilities, especially when using the electric starter powered by the YTZ7S battery. Regular inspection of the electrical harness is recommended, as the ME11A/D series is known for its reliability, provided the ground connections remain free of corrosion.
MotoSpecsLab Verdict
The Honda CRF 250 X remains a gold standard for 250cc four-stroke enduro bikes. Its longevity in the market (13 years without major architecture changes) is a testament to the robustness of the ME11 platform. For the modern enthusiast, strict adherence to the dual-sump oil schedule and valve clearance checks is the key to unlocking 200+ hours of reliable trail performance.